Hanna Gabriels for the vacant IBF and WBA Middleweight World Championships at Masonic Temple in Detroit.

“I can’t wait to get into the ring on June 22,” said Shields.

“I love the fight against Hanna Gabriels – champion versus champion, exactly the kind of fight that I want every time to take women’s boxing to new heights. I’ve said one of my goals is to win world championships in three weight divisions. I’m proud to be super middleweight champion, and on June 22 I will add the middleweight championship to my accomplishments. I’m excited to be working with John David Jackson for the next step in my career as I look to conquer another division.”

Two-division champion Gabriels (18-1-1, 11 KOs) is the reigning WBA and WBO World Champion. The native of Costa Rica won her first world title at welterweight in 2009 and has since fought in an astounding 11 consecutive world title fights. The 35-year-old won her first belt in the 154-pound division in 2010 and became unified champion in 2016. In her last bout, Gabriels avenged the only loss on her record, a 2013 defeat to then-undefeated title challenger Oxandia Castillo. She looks to become a three-division world champion on June 22.

Unified women’s middleweight champion Christina Hammer will make her United States debut in an un-televised fight, as she defends her WBC & WBO titles against former world champion Tori Nelson.

If both Shields and Hammer are victorious in their 160-pound bouts on June 22, they will meet in a fall blockbuster on SHOWTIME to determine the undisputed women’s middleweight world champion.

“I have been training intensively for months for my first fight in the U.S.,” Hammer said.

“I can’t wait to show my skills, desire and hunger to America and prove that I am THE middleweight champion of the world. While I have great respect for Tori Nelson, I promise I will defeat her in spectacular fashion on June 22 and send a message to Claressa Shields. It’s my time to shine!”